Godet arrangement



Filed May 13, 1938 INVENTOR. JOHN J. KPfHB/EL.

ATTORNEY.

Y Y B Patented Sept. 22, 1942 UNITED STATES PATENT OFFICE cona'r ARRANGEMENT John J. Krehbiel, Bridgeport, Conn. Application May 13,1933, Serial No. 207,821

5 Claims- This invention concerhs a godet arrangement, i. e., an arrangement for and a method of conveying spun artificial silk, e. g. from a setting bath to a first point of destination.

For various purposes a path of travel having a certain length is provided for the newly spun silk, as it progresses to a first point of delivery.

Stretching is one important operation applied to the spun silk in its first travel. Aside from contemplating a much needed improvement; of the stretching of the newly spun silk-and more par-' ticularly a ready control thereof-this invention has various other objects. Thus, for instance, the improvements herein are to deliver the spun silk at a uniform speed of travel and offer a control to this end, so that the silk may be spooled or piled in a consistently orderly fashion at all times.

It is an important object of this invention to facilitate the checking or even metering of the condition of a progressing spun silk, and of providing for simple and quick adjustment in the friction and tension, and stretching, slackening, advancing or retarding applied to spun silk, as it progresses.

The method for this invention will therefore not only find ready application in the process of spinning artificial silk, but also in the laboratory, where tests are made on the basis of performance, and where the mechanical handling best suited for manufacture is evaluated by experiments.

Dther objects of this invention will be more clearly recognized from the following description thereof.

The exemplary showings of the, accompanying Fig. 1 of the drawing shows a filament l2 to godet upon the filament, and the speed at which said periphery is driven in advance of the speed at which the filament is fed from the setting bath drawing is schematic in as much as it is not an illustration of all details of handling spun silk; nor is it in true proportion. The drawing emphasizes the arrangement of godets, more partic ularly in respect to each other, it being however understood, that godets so arranged may be spaced and applied at any point of travel of a spun silk and in any desired number.

In the drawing:

The schematic elevation of Fig. 1 shows the progress ofspun silk from a. bath to the spinning p Fig. 2 is a cross-sectioned detail view taken in planes indicated by dot-dash lines in Fig. 1 and in a direction there pointed out by the numeral 2. The schematic plan'view of Fig. 3 indicates the progress of spun silk to a bobbin.

Similar numerals refer to similar parts throughout the various views:

or from an intermediate point determines the pull applied to the filament. If therefore the pull exerted by a godet was to be changed in the prior art; e. g. increased, a mechanical rearrangement has to be brought about; i. e the speed of revolu tion had to be increased by a change in the drive, a larger godet had to be substituted, or the shape or physical structure of the periphery of the godethad to be changed, in order to provid for larger friction. Such substitutions or changes 1 of the prior art ordinarily require an interruption of operation. It is an object of this invention to provide for adjustment of the pull of the godets at will, and during operation if so desired.

The pull of a godet may be expressed by, i. e. it

is substantially inversely proportional to the ratio of the slip of the filament on the godet. If therefore a greater contact between the filament and the godet is effected, the increased friction will decrease the slip and increase the pull. If we change, therefore, the angle at which a filament is fed onto a godet, the extent of contact of the filament with the godet will change, and slip and pull will be correspondingly altered. Accordingly this invention provides for an adjustment of the angle between the portions of filament extending to and from a godet. Such adjustment may be very effectively brought about, according to this invention, by relatively moving godets particularly transversely past each other, for instance by swinging them in relation to, or revolving them about each other, because the limit of contact of the filament with a godet may be changed many times by such a movement. The godet movement for increased pull will generally be in the direction of the apex of the loop of filament extended over the godet, the path of the filament godet, which may for instance be the last godet applied to a filament. Such a guide godet is diameters of the godets l8 preferably applied at a peripheral speed substantially equalto the linear speed at whichthe filament is to be delivered at a point of destination, or at a speed slightly but predeterminedly in excess of the latter speed. Such a guide godet offers av convenient gauge for determining whether or not the other godets apply the proper pull. By

way of contrast to the guide godet these other godets will hereinafter be called pull godets.

For purposes of this invention godets of the usual type may be used, for instance glass godets with a grooved periphery, the periphery having the general appearance of a finally .toothed gear. Or any other type of godets ofiering a uniform slipmay be used. But it may also be desirable to select the guide godet with a purview of avoiding slip, a solid periphery executed in a better gripping material, such as hard rubber, being for instance in order.- Thus the guide godets l5 and I6 are shown to have solid peripheries II,

whereas thepull godets I8, I9, 20, 2| and 22 are indicated by dash lines to, be provided with grooved peripheries 29, as, it is actually shown on godet [8.

Let the shaft 24 of godet I 8 be driven at a predetermined speed, which speed may stand in predetermined relation to the speed of rotation of pot I l. A gear 25 is mounted upon shaft 24 behind the panel l9, and a gear 26 meshes withgear 25 and drives the guide godet I5 in clock- .wise direction at a peripheral speed, which may be the linear speed at whichthe filament is to be delivered to the pot H, or which may slightly exceed the'said speed. 'Then the diameter of the effective periphery of the pull godet l8, which is mounted on shaft 24, is chosen so that the filament pulled by said periphery and slip thereon is delivered to godet i5 substantially at a linear speed equal to the peripheral speed of godet I5. Thus the gear ratio 25-49 and the and i5 may be sethe peripheral speed percent larger than lected, for instance, so that of the godet I8 is about that of godet l5. a

Godet I9 is also driven from shaft 24, by way of gear 21 meshing in gear 25. Here the gear ratio -26 and the ratio of diameters of thegodets l9 and I9 may be chosen, so that godets I8 and I9 have substantially the same peripheral speed. However, the peripheral speed of godet I 9 may slightly lag behind that of godet l8, if there is a substantial distance between godets i8 and I9, so that a stretching of the tion,'e. g. by a lock pin 9| which may be tensioned by a suitable spring in one or other of holes 32 in panel i9.

disc 29 is adjusted in its extreme 'position in a counter-clockwise direction, the'filament I2 con- ,tacts less than one-third of the peripheries of the pull godets l8 and i9. correspondingly much less pull is exerted in the latter case than in the case of the arrangement of the pull godets as shown in 1. By way of intermediate po-' sitions of the swing bracket or disc 29 the stretching pull exerted upon the filament may be ad- 1 justed within the range of the extremes just de-, scribed.

In accordance with the relative adjustment of the two godets l9 and I9 the slackness or tautness of the portion of filament 22 extending between godets l9 and IE will be changed. By

observing the slack obtained at said portion 92 of the filament, we may therefore determine the filaments passing from the latter to the former might be expected.

According to 'the drawing the godet I9 is not allocated at a fixed position but its drive extends through a circular slot 29 in panel l3, and it is rotatively mounted upon a swing bracket 29. Swing bracket 29 is fulcrumed upon the hub 24 from the panel II. In the closure provided b the panel I: between the gearing and the bid:

.slot 28.-

Swing lever or disc 29 may be swung into various positions around the hub 99, the driving re- 30, in which the shaft 24 is journalled, and which hub 99 extends concentrically with the said shaft order not to interrupt lationship between godets II and I9 being Dre-- served at all times by way oi! the meshing gears 25. and 21; The

lever or disc 29 may be '85 erative parts to the front thereof, .the swing.

adjusted and locked in a preferred angular posicorrect position of swing bracket or disc 29. Such slack may be determined by vision or touch, or by a suitable indicator, for instance by a swing lever with an idler pulley resting upon said por-- tion 99, as-known.

Fig. 3 shows a device of this invention applied in multiple, producing several variable stages of,

stretching. It is of course ordinarily desirable to provide for greater stretching distances, than those here shown.

In the showing of Fig. 1 various speeds of rev olution of the different godets were obtained bythe gearing. Thus the godets l9 and II may be of the same diameter, although the godet l9 hasa larger peripheral speed than the godet l5. In the showing of Fig. 3 all godets are driven at'the same speed of revolution, a variation of peripheral speed being produced by adjustin gthe diameters of the various godets.

After the filament has been passed between the pairs 20, 2| and 22 of pull godets and over the guide godets' l6 mounted upon panel 39 it is guided by way of a feed" onto the bobbin 38. The speed of take up of feed 31 andtbobbin 38 is arranged from the start to be substantially the same as the circumferential speed of guide godet i9. Helical gears lllon the shaft 99 drive gears 4|. on the upper godets of the pair of godets 29, 2| and 22 at the same speed of revolution, and the driven gear 4| on the top pull godet 22 drives the guide godet IS with a similar gear 4| at the same speed of revolution by way of an interposed idler gear 42.

Similarly to the swing lever or disc 29 of Fig. 1 round discs 43, 44, 45 carry the lower. ones of pairs of pull godets 20, 2| and 22, said godets being again connected into the chain of gearing by further gears 4| mounted on the respective shafts to-the back of the panel 39. The godets of each pair 29, 2| and 22 are shown to be substantially like diameter. Whereas the pairs.

compared with each other, are of ,increasing' I size, godets 2| being larger than godets 29, and

godets 22 being larger than godets 2|.

1 A Godet I6 is however smaller than godet 22.

Step by step. progressing from pair to pair 'of h qpull godets, we may vary the stretching action. I

The pull or'the slip, of each pair of godets is controlled by angularly positioningof the discs 43.

- tending from the upper pull 48 therebelow on panel 35. Eccentric lugs 39 may be used for positioning the discs 43, 44 and 45 in preferred positions.

The discs 43, 44 and 45 are shown inthe drawing to be swung substantially to an extreme position in a clockwise direction. In that instance there is very little friction and contact of the filament 35 upon the pull godets 20, 2| and 22. But in the instance of each 01 the pull godets 20, 2|. and 22 the contact of the filament with the pull godet may be increased manifold, by swinging the respective discs 43, 4401- 45 in counter-clockwise direction to a position, where the desired contact and pull is obtained. The effect of an adjustment ofdiscs 43,44 and 45 may again be tested, for instance by observing the tautness or slackness oi the stretch of the filament 35 exgodet 22 to the guide godet I6.

Godets may thus be combined into units, which allow an adjustment 0! the stretching action at 25 will. 4

Having thus described my invention by way of" two modifications, yet I do not wish to be limited thereby, except as the state of the art and the appended claims may require, for it is obvious that various modifications and changes may be made in the form of embodiment oi my invention, without departing from the spirit and scope thereof.

' 2. In a spinning apparatus, a feed godet, a pull godet and aguide godet successively interposed in the path of travelling spun silk, a drive. rotating said guide godet at a peripheral speed substantially equal to the speed at which the spun silk is to be delivered and said feed godet and said pull godet at a peripheral speed predeterminedly. exceeding the peripheral speed of said guide godet, said feed godet serving to deliver silk to said pull godet and being angularly adjustable relatively to and around said pull godet.

3. In a spinning apparatus, a pull godet and a guide godet successively interposed in the path of travelling spun silk, a drive rotating said guide godet at a peripheral speed substantially equal to thespeed at which the spun silk is to be delivered and said pull godet at a peripheral speed predeterminedly exceeding the peripheral speed of said guide godet, another godet revolvablearound said pull godet and connected to be rotated by said drive.

4. In a spinning apparatus, a delivery odet, a pull godet, a guide godet feeding artificial silk to said pull godet, said .pull godet delivering the silk to said delivery godet, said guide godet bea pull godet, a guide godet receiving artificial.

silk from said pull godet and delivering it to said delivery godet, said pull godet being movable around the axis of said guide godet in a plane substantially normal to the axis of the pull godet, so that the angle, at which the silk is delivered from the pull godet, may be adjusted at will, and gearing rotating said pull godet and guide godet at substantiallylike peripheral speeds, but said delivery godet at a lower speed.

' I JOHN J. KREHBIEL. 

